We consider an indoor environment with multiple
Body Area Networks (BANs) that have to transmit data towards
specific sinks, located in fixed positions. Nodes deployed on the
same body may cooperate in order to form Virtual Antenna
Arrays (VAA) and transmit data towards one of the available
sinks. Sinks are also equipped with multiple antennas, such that
a virtual Multiple Input Multiple Output (MIMO) channel can
be established. Beamforming is used as cooperation technique.
Results obtained through simulations clearly show the advantages
of cooperation among nodes in BANs. We also investigate
different scheduling techniques that sinks may adopt in order
to optimise different performance metrics.